解题方法
1 . 已知等差数列
满足
.
(1)求
的通项公式;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ea402d4d2bd3221e270681cd2ed7e1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-12-19更新
|
1736次组卷
|
8卷引用:浙江省金华十校2022-2023学年高三上学期期末模拟数学试题
名校
解题方法
2 . 已知数列
的前n项和为
,若
.
(1)求证:数列
是等差数列;
(2)若
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a86bf1f772a6dbdeed5cb302b543b9.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4e834a9a9288f5bf8356eb691ca36f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-12-01更新
|
1724次组卷
|
6卷引用:浙江省绍兴市鲁迅中学2022-2023学年高二普通班上学期期末模拟数学试题
浙江省绍兴市鲁迅中学2022-2023学年高二普通班上学期期末模拟数学试题黑龙江省哈尔滨师范大学附属中学2022-2023学年高二上学期期中考试数学试题(已下线)专题16 选择性必修第二册综合练习湖北省襄阳市第四中学2022-2023学年高二上学期12月月考数学试题广东省广州市华南师范大学附属中学2022-2023学年高二上学期阶段测试(二)数学试题(已下线)期末考试押题卷02(考试范围:选择性必修第一册)-2022-2023学年高二数学新教材同步配套教学讲义(苏教版2019选择性必修第一册)
解题方法
3 . 已知等差数列
的前
项和为
,且满足
.
(1)求
的通项公式;
(2)记
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d6f5b8045fa12951015eb691af793c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbcdb5dc760e87ec2d5d33e0d2cbf57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次